MARSHALL: ADDITIONS TO “ BRITISH CONCHOLOGY.” 345 
Var. nummarius Turt.—Not P. xummarius 1L., which latter 
is P. violascens Lamk. 
Jeffreys’ generic figure is the Channel Islands’ orbicular 
form, and his plate figure the oblique, or what is usually 
considered the typical one; although the former should 
properly be the type, as it was originally described by 
Linné “ad insulam Garnsey.” 
Arca pectunculoides Sc.—20—gof. Off the Island of Rona, 
east of Skye, rather plentiful in one spot (Coulson) ; the 
Minch, 20—53 f., valves abundant. 
A. lactea L.—-Jeffreys was very wide of the mark in giving the 
range of this species at 1525 f. It is a well-known low- 
water mark shell, attached by a byssus to the under-sides 
of stones. The noted shell-beach of Herm is composed 
principally of the valves of this species. Jeffreys made 
another slip in stating that his largest specimen was three- 
quarters of an inch in #ezgth—he should have said breadth. 
I have a similar giant from Torquay. 
Galeomma turtoni Ed. Z. J.—Scilly, 40 f. (Burkill and 
J.T.M.); Skerries Shoal, off the Start, S. Devon, 15 f. 
The tale recorded by Mr. Clark’s boatman will not 
stand. Galeomma does not behave at all in the way indi- 
cated. The cupidity of Branscomb was kept alive by the 
gifts and promises of his generous employer, with the result 
that Galeomma was not the only species he “discovered” 
that afterwards had to be abandoned as wanting in proba- 
bility. 
For some years Galeomma has been steadily disappear- 
ing from its Herm Jocaée, the original collecting-ground of 
Turton. This has arisen partly from over-collecting, but 
principally from the destructive effects of ormer-gathering, 
by which every stone is being continually turned over and 
over again. It is now almost extinct in its original home. 
The one or two fishermen at Guernsey initiated in this 
species have corrupted the name to “ G7//y-ormer.” 
